/*
 * Copyright (c) 2012, Willow Garage, Inc.
 * Copyright (c) 2017, Open Source Robotics Foundation, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "rviz_common/load_resource.hpp"

// #include <boost/filesystem.hpp>
// #include <ros/package.h>
// #include <ros/ros.h>

#include <QPixmapCache>
#include <QPainter>

#include "rviz_common/logging.hpp"

namespace rviz_common
{

// TODO(wjwwood): replace this with ROS 2 and boost-free version
// boost::filesystem::path getPath(QString url)
// {
//   boost::filesystem::path path;

//   if (url.indexOf("package://", 0, Qt::CaseInsensitive) == 0) {
//     QString package_name = url.section('/', 2, 2);
//     QString file_name = url.section('/', 3);
//     path = ros::package::getPath(package_name.toStdString());
//     path = path / file_name.toStdString();
//   } else if (url.indexOf("file://", 0, Qt::CaseInsensitive) == 0) {
//     path = url.section('/', 2).toStdString();
//   } else {
//     ROS_ERROR("Invalid or unsupported URL: '%s'", url.toStdString().c_str() );
//   }

//   return path;
// }


QPixmap loadPixmap(QString url, bool fill_cache)
{
  QPixmap pixmap;

  // TODO(wjwwood): reenable this, or in the meantime add a placeholder pixmap
  Q_UNUSED(url);
  Q_UNUSED(fill_cache);
  // RVIZ_COMMON_LOG_WARNING_STREAM("did not load pixmap at " << url.toStdString());
  // // if it's in the cache, no need to locate
  // if (QPixmapCache::find(url, &pixmap) ) {
  //   return pixmap;
  // }

  // boost::filesystem::path path = getPath(url);

  // // If something goes wrong here, we go on and store the empty pixmap,
  // // so the error won't appear again anytime soon.
  // if (boost::filesystem::exists(path) ) {
  //   ROS_DEBUG_NAMED("load_resource", "Loading '%s'", path.string().c_str() );
  //   if (!pixmap.load(QString::fromStdString(path.string() ) ) ) {
  //     ROS_ERROR("Could not load pixmap '%s'", path.string().c_str() );
  //   }
  // }

  // if (fill_cache) {
  //   QPixmapCache::insert(url, pixmap);
  // }

  return pixmap;
}

QCursor getDefaultCursor(bool fill_cache)
{
  Q_UNUSED(fill_cache);
  return QCursor(Qt::ArrowCursor);
}

QCursor makeIconCursor(QString url, bool fill_cache)
{
  // TODO(wjwwood): reenable this
  Q_UNUSED(url);
  Q_UNUSED(fill_cache);
  // RVIZ_COMMON_LOG_WARNING_STREAM("did not load icon as cursor at " << url.toStdString());
  return QCursor(Qt::ArrowCursor);
#if 0
  QPixmap icon = loadPixmap(url, fill_cache);
  if (icon.width() == 0 || icon.height() == 0) {
    ROS_ERROR("Could not load pixmap '%s' -- using default cursor instead.",
      url.toStdString().c_str() );
    return getDefaultCursor();
  }
  QString cache_key = url + ".cursor";
  return makeIconCursor(icon, cache_key, fill_cache);
#endif
}

QCursor makeIconCursor(QPixmap icon, QString cache_key, bool fill_cache)
{
  // TODO(wjwwood): reenable this
  Q_UNUSED(icon);
  Q_UNUSED(cache_key);
  Q_UNUSED(fill_cache);
  // RVIZ_COMMON_LOG_WARNING_STREAM("did not make icon into cursor at " << cache_key.toStdString());
  return QCursor(Qt::ArrowCursor);
#if 0
  // if it's in the cache, no need to locate
  QPixmap cursor_img;
  if (QPixmapCache::find(cache_key, &cursor_img) ) {
    return QCursor(cursor_img, 0, 0);
  }

  QPixmap base_cursor = loadPixmap("package://rviz/icons/cursor.svg", fill_cache);

  const int cursor_size = 32;

  cursor_img = QPixmap(cursor_size, cursor_size);
  cursor_img.fill(QColor(0, 0, 0, 0) );

  // copy base cursor & icon into one image
  QPainter painter(&cursor_img);

  int draw_x = 12;
  int draw_y = 16;

  // if the icon is too large, move it to the left
  if (draw_x + icon.width() > cursor_size) {
    draw_x = cursor_size - icon.width();
  }
  if (draw_y + icon.height() > cursor_size) {
    draw_y = cursor_size - icon.height();
  }

  painter.drawPixmap(0, 0, base_cursor);
  painter.drawPixmap(draw_x, draw_y, icon);

  if (fill_cache) {
    QPixmapCache::insert(cache_key, cursor_img);
  }

  return QCursor(cursor_img, 1, 1);
#endif
}

}  // namespace rviz_common
